Has anyone used these? If so, did you use the supplied poly bushings and "thrust washer" that came with the arms. I've got them on my 67 and noticed that the thrust washer has slipped over the end of the control arm and is just hanging there pinched between the bushing and control arm. Just wondering if these things are essential and if so, why are mine popping off. I installed them on the inboard side of the bushing as per the instructions. I've tried emailing EBrock 2 weeks ago with no response and can't get through on their tech line.

Thanks for any help.